@Broc Tuah
@pastera is correct wrt post 10/22 80s or 76s or 0s.
Here’s the language on untraceable firearms.
Section 121C.
(a) All firearms shall have a serial number in accordance with the requirements of this section. To meet serialization requirements all firearms shall be conspicuously engraved, cast or otherwise permanently embedded with a unique serial number on the frame or receiver; provided, that the serial number shall be placed in a manner not susceptible of being readily obliterated, altered or removed and shall be engraved, cast or otherwise permanently embedded to a depth of not less than .003 inches and in a print size not less than 1/16 inch; provided further, that the serialization of firearms, frames and receivers made from non-metallic materials shall be accomplished by using a metal plate permanently embedded in the material of the frame or receiver
(b)
No person shall knowingly possess, manufacture or assemble, cause to be manufactured or assembled, purchase, offer for sale, sell or otherwise transfer or import an untraceable firearm in the commonwealth; provided, however, that lawfully owned firearms imported or acquired by: (i) new residents moving into the commonwealth or acquired by heirs or devisees through distribution of an estate shall be serialized within 60 days of import or acquisition; and (ii) licensed firearms dealers, gunsmiths, distributors or manufacturers shall be serialized within 7 days of import or acquisition.
(c)
No person shall manufacture or assemble a privately made firearm without: (i) obtaining a unique serial number from the department of criminal justice information services prior to manufacture or assembly; (ii) serializing the firearm with the obtained serial number during manufacture or assembly; and (iii) registering the firearm with the department of criminal justice information services in accordance with section 121B within 7 days of the firearm’s manufacture or assembly.
And the felonious portion of Chapter 269 Section 11C
Whoever, by themself or with another, knowingly manufactures, assembles, imports, sells or transfers ownership of an untraceable firearm, or knowingly participates in the manufacture, assembly, import, sale or transfer of an untraceable firearm or purchases or receives a firearm with knowledge that it is untraceable, shall be punished by imprisonment for not less than 12 months and not more than 2½ years. Possession or control of a firearm that is untraceable shall be prima facie evidence that the person having such possession or control is guilty of a violation of this section; but such prima facie evidence may be rebutted by evidence that such person had no knowledge that the firearm was untraceable, or by evidence that they had no guilty knowledge thereof. Upon a conviction of a violation of this section said firearm shall be forwarded, by the authority of the written order of the court, to the colonel of the state police, who shall cause said firearm or to be destroyed.